[CentOS] vgrename, lvrename

chris procter chris-procter at talk21.com
Sat Sep 11 16:11:22 EDT 2010

>I want to rename some volume groups and logical volumes.
>I was not surprised when it would not let me rename active volumes.
>So I booted up the system using the CentOS 5.5 LiveCD,
>but the LiveCD makes the logical volumes browsable using Nautilus,
>so they are still active and I can't rename them.
>/usr/sbin/lvchange -a n VolGroup00/LogVol00
>but it still says:
>   LV VolGroup00/LogVol00 in use: not deactivating

If its mounted you'll need to unmount it before you can deactivate it, and if 
its in use you wont be able to unmount it....  

I'm guessing that with a  name like VolGroup00/LogVol00 its probably the root 
filesystem so probably the best procedure is to boot from your live CD, then 

umount /dev/VolGroup00/LogVol00
and you should then be able to deactivate it then do your lvrename/vgrename 

You'll also need to change any entry it may have in /etc/fstab before you reboot 
back onto the internal disks, or it wont mount on bootup and if its the root 
filesystem thats pretty fatal!



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